Conclusions
Cyclization of 2-(1-methyl-2-butenyl)anilines in polyphosphoric acid proceeds with isomerization of the side chain and leads to indolines and indanes in high yields.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 4, pp. 839–842, April, 1985.
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Abdrakhmanov, I.B., Mustafin, A.G., Sharafutdinov, V.M. et al. Reaction of 2-(1-methyl-2-butenyl)anilines with polyphosphoric acid. Russ Chem Bull 34, 760–763 (1985). https://doi.org/10.1007/BF00948054
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DOI: https://doi.org/10.1007/BF00948054